Araeonema microspirulata Yoo, 1988: 243, figs 46-49.

Dimensions. Holotype (F61958) H 1.2 mm, W 1.1 mm.

Additional material. 73 specimens from 'Marohn' (Locality 28), 2 from Glenbawn (Locality 29) and 1 from 'Lorrina' (Locality 23).

Geographic distribution. 'Lorrina' to Glenbawn.

Geological age. Late Tournaisian.

Remarks. This species has a very thin shell, yet is extremely well preserved. It is one of the most abundant species at the type locality. A single worn specimen recovered from the upper part of the Namoi Formation at 'Lorrina' is tentatively referred to this species.